Is fasting valid if one drank water and did not know that the Fajr adhan was being called?

Question:
The questioner says: I intended to fast to make up a day of Ramadan from the night, and during the Fajr adhan I drank water without knowing about the adhan. I finished drinking in the middle of the adhan and completed my fast. Is my action valid?

Answer:
This varies according to the mu'adhdhins. If the mu'adhdhin calls the adhan at the appointed time, it is not permissible for you to consume anything after the adhan has begun, because he is calling at the time of Fajr. The Prophet (peace and blessings be upon him) said: Ibn Umm Maktum calls the adhan at the appearance of Fajr. So do not eat after his adhan if he is calling at the time. However, if he is calling before the time in order to wake people up, then eat and drink until the mu'adhdhin who calls at Fajr calls the adhan. Yes.